package edu.friday.common.config;

import edu.friday.common.security.filter.JwtAuthenticationTokenFilter;
import edu.friday.common.security.handle.AuthenticationEntryPointImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

/**
 * 配置 Spring Security
 */
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfigurerAdapter extends WebSecurityConfigurerAdapter {
    /**
     * 自定义用户认证逻辑
     */
    @Autowired
    private UserDetailsService userDetailsService;
    /**
     * 认证失败处理类
     */
    @Autowired
    private AuthenticationEntryPointImpl authenticationEntryPoint;

    @Autowired
    private JwtAuthenticationTokenFilter authenticationTokenFilter;

    /**
     * 解决 无法直接注入 AuthenticationManager
     */
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity
                // CSRF禁用 因为不使用session
                .csrf().disable()
                // 认证失败处理类
                .exceptionHandling().authenticationEntryPoint(authenticationEntryPoint)
                // 基于 token 所以不需要 session
                .and().sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                // 过滤请求
                .and().authorizeRequests()
                // 对于登录 允许匿名访问
                .antMatchers("/login", "/profile/avatar/**").anonymous()
                .antMatchers(HttpMethod.GET, "/*.html", "/**/*.html", "/**/*.css", "/**/*.js").permitAll()
                .antMatchers("/profile/**").anonymous()
                // 除了上面的之外所有请求都要鉴权认证
                .anyRequest().authenticated()
                .and().headers().frameOptions().disable()
                .and().addFilterBefore(authenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
    }

    /**
     * 强散列哈希加密实现
     */
    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }

    /**
     * 身份认证接口
     *
     * @param auth the {@link AuthenticationManagerBuilder} to use
     */
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(bCryptPasswordEncoder());
    }

}
